Mild 318 pinging

Just for kicks, get a compression tester on it and see what the cylinder pressure is.
Finally got around to doing a compression test. Engine was warmed up with throttle blocked open and all results are dry. The first 4 or 5 cylinders reached max pressure at 5 strokes. The last few took 6 or 7 strokes as I think the starter was slowing a little even though I had a charger on the battery. I did check #3 a second time with oil and saw no difference. I'm pretty happy with the results considering a stock 74 smogger shortblock with a little cam. I wasn't sure how many strokes to max is normal. Plugs all look good, also.

1-150
2-145
3-145
4-143
5-145
6-145
7-153
8-150